Leave those volcano comedy storyboards until tomorrow, as you'll be burning the midnight oil watching an awkward armistice in the McCain/Letterman War of '08. WATCH Late Show with David Letterman [11:30 pm, CBS] - What elevates the big Senator John McCain show above TiVo is the 20 minutes before the interview when Letterman will revisit every single event that has transpired since McCain's cancellation and the segment immediately following the interview that will begin with a zinger Letterman's been crafting for weeks. You'll want to be the guy/gal at work telling everyone to go to Defamer and check out the vid.

SNL Weekend Update Thursday [9:30 pm, NBC] - NBC has found itself in the middle of the political excitement by vacuum packing the best parts of its less-than-hilarious weekend show into thirty minutes of general election lampoonery. This week's special will hopefully answer the question we've all asked ourselves over the last 18 hours: which cast member will appear as Joe the Plumber? The smart money's on Will Forte or possible guest star George Wendt. The Office [9 pm, NBC] - Michael and Dwight act out different birthing scenarios and the ladies throw a shower in honor of Jan's baby. We didn't receive our advance copy of the episode, but odds are that the rest of the office will roll their eyes, undercut each other in various ways and make world-weary statements to the camera. TiVo Grey's Anatomy [9 pm, ABC] - Meredith breaks down when Derek finds her mother's journal. Christina finds a section of the hospital she has never seen before. Callie gets cold feet at the thought of her first date with Erica. Skip everything having to do with the last two sentences.

Celebrity Meltdowns: Ranked [10 pm, MTV] - Everyone loves pseudo-science (except these dudes), so a show where MTV randomly assigns point values and rankings to pop culture events should be blipping loudly on your radar. Tonight, it's an hour of Celebrity Meltdowns. Scan through to your favorite meltdowns, now 1500% larger. The Sarah Silverman Program [10:30 pm, Comedy Central] - Sarah dumps her old, low-energy-but-still-funny friends and assaults new ones. Fast-forward through anything that does not involve verbal harassment (this cuts out about 2-3 minutes). Look for a possible ratings bump from Obama-converted Jewish grandparents in Florida. KILL

Survivor: Gabon - Earth's Last Eden [8 pm, CBS] - How is this one of the highest-rated shows on TV? The Darwinian phase of reality television (Survivor, Amazing Race) should have ended by now. The fashion phase (America's Next Top Model, Project Runway) has clearly peaked and we're moving into the golden age of shows about people doing really difficult/stupid jobs (Deadliest Catch, Ice Road Truckers). From there it can go two directions: "serial killereality" (Network Exec: "It's like Dexter, but real.") or "maximum derivative" (Grandparent Swap). Testees [10:30 pm, FX] - Just because It's Always Sunny in Philadelphia is your lead-in, doesn't mean you have to top their clever lack of good taste by making your show tasteless and not funny. Tonight, Peter and Ron find out what it's like to be a woman after a botched penis test. Sarah Silverman does gross/offensive much better in the same slot (not a vagina reference).